RESEARCH BASE
Search 3,721 documents across 34 fields — every claim tier-rated by evidence
3,633 are the core, quality-scored corpus (34 lettered sections — see How We Work); the remaining 88 are cross-corpus synthesis documents (68 InterDocs, 12 Connections, 8 Theories) also indexed here.
3,105 results for "St Michael's Line" — page 21 of 156
E_3_08 — Dansgaard-Oeschger Events and Abrupt Climate Change
Dansgaard-Oeschger (DO) events are rapid climate oscillations during the last glacial period (c. 115,000–11,700 years ago) characterized by abrupt warming of 5–16°C in Greenland within decades — among the most dramatic a
E_3_18 — Black Mat: Younger Dryas Boundary Layer Geochemistry
The "black mat" is a thin, dark, organic-rich sedimentary layer found at dozens of archaeological and geological sites across North America, dating to the onset of the Younger Dryas stadial (~12,800 cal BP). First system
E_3_20 — Dansgaard-Oeschger Events: Rapid Climate Oscillations
Dansgaard-Oeschger (D-O) events are rapid climate oscillations first identified in Greenland ice cores, characterized by abrupt warming of 8–16°C over Greenland within decades, followed by gradual cooling over centuries
E_3_16 — Urban Fire and Civilizational Destruction: Rome, London, Chicago
Urban fires have been among the most recurrent and devastating agents of civilizational destruction throughout recorded history, repeatedly leveling major cities and reshaping their physical layouts, governance structure
E_3_14 — Missoula Floods: Channeled Scablands and Catastrophism Vindicated
The Missoula Floods (also called the Spokane Floods or Bretz Floods) were a series of catastrophic megafloods — among the largest known floods in Earth's history — that swept across the inland Pacific Northwest of the Un
E_3_10 — Clathrate Gun Hypothesis
The clathrate gun hypothesis proposes that warming of ocean waters or thawing of permafrost can destabilize methane clathrates (also called methane hydrates) — ice-like crystalline structures in which methane molecules a
E_2_25 — Glacial Lake Outburst Floods (GLOFs): Catastrophic Drainage Events
Glacial Lake Outburst Floods (GLOFs) — also known by the Icelandic term jökulhlaup — are sudden, catastrophic releases of water from glacially dammed or moraine-dammed lakes, producing some of the largest known flood eve
E_2_27 — Mega-Tsunami History: Evidence for Catastrophic Wave Events
Mega-tsunamis — wave events with initial amplitudes of tens to hundreds of meters, far exceeding the 10–30 m waves generated by typical seismic tsunamis — are produced by catastrophic mechanisms including volcanic flank
E_2_21 — Mount Vesuvius and the Destruction of Pompeii and Herculaneum (79 CE)
The eruption of Mount Vesuvius on August 24, 79 CE (or possibly late October, per recent evidence) destroyed the Roman cities of Pompeii and Herculaneum in one of the most well-documented natural disasters of antiquity.
E_4_21 — Oxygen Isotope Stages: Marine Isotope Record and Climate Cycles
The marine oxygen isotope record — constructed from measurements of the ratio of oxygen-18 to oxygen-16 (δ¹⁸O) in the calcium carbonate (CaCO₃) shells of foraminifera (single-celled marine organisms) preserved in deep-se
E_4_20 — Catastrophism vs. Uniformitarianism: History of the Debate
The catastrophism vs. uniformitarianism debate represents one of the most consequential intellectual controversies in the history of science — fundamentally shaping how geologists, biologists, and historians understand t
E_4_14 — Stratigraphic Methods and Geological Timekeeping
Stratigraphy — the study of rock layers (strata) and their sequential relationships — is the foundational framework for understanding geological time and establishing the chronology of Earth's 4.54-billion-year history.
E_4_25 — Bayesian Age Modeling: Statistical Frameworks for Archaeological Chronology
Bayesian age modeling — the application of Bayesian statistical inference to combine radiocarbon dates with prior archaeological knowledge (stratigraphy, typology, historical constraints) to produce refined chronological
E_1_14 — Supernovae in Human History: Crab Nebula, SN 1006, Vela
Supernovae — the catastrophic explosions of massive stars (core-collapse, Type II/Ib/Ic) or white dwarfs exceeding the Chandrasekhar mass limit (thermonuclear, Type Ia) — are among the most energetic events in the univer
E_1_01 — The Younger Dryas Impact Hypothesis (YDIH)
This document examines The Younger Dryas Impact Hypothesis (YDIH), a topic within the Cataclysms and Chronology research area. Notable findings include: Greenland ice-core data confirm rapid cooling at onset and abrupt w
E_5_09 — Catastrophism vs Uniformitarianism: Geological Paradigm Debates
The catastrophism vs uniformitarianism debate shaped the foundations of modern geology and continues to evolve. Georges Cuvier (1769–1832) championed catastrophism — the idea that Earth's geological features were shaped
E_5_01 — Bronze Age Collapse: A Detailed Systems Analysis
The Late Bronze Age Collapse (c. 1200–1150 BCE) was one of history's most devastating civilizational catastrophes — a cascading multi-system failure that destroyed or severely diminished virtually every major palace-base
E_5_06 — Holocene Sixth Mass Extinction: Current Biodiversity Crisis
The Holocene "Sixth Mass Extinction" hypothesis holds that current species loss rates are 100–1,000 times the normal background extinction rate, driven primarily by human activity: habitat destruction, overexploitation,
ZG_2_06 — Historical Linguistics and Language Family Classification
Historical linguistics is the scientific study of how languages change over time, how they are related to each other, and how they can be grouped into language families descended from common ancestors. The discipline's c
ZG_2_16 — Khoisan Click Languages & African Linguistic Diversity
Click consonants — produced by rarefaction of air using the tongue against various parts of the oral cavity — are among the most phonetically complex sounds in human language, found as regular phonemes in approximately 3
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